$ sudo apt-get remove euca2ools 

Uninstall euca2ools including dependent package

If you would like to remove euca2ools and it's dependent packages which are no longer needed from Ubuntu,

$ sudo apt-get remove --auto-remove euca2ools 

Use Purging euca2ools

If you use with purge options to euca2ools package all the configuration and dependent packages will be removed.

$ sudo apt-get purge euca2ools 

If you use purge options along with auto remove, will be removed everything regarding the package, It's really useful when you want to reinstall again.

$ sudo apt-get purge --auto-remove euca2ools 

See Also,